Thoughts on Apple Mac Pro vs GCP/AWS for Deep Learning?
The Mac Pro uses AMD GPUs. These don't support CUDA, but instead support the OpenCL framework.

TensorFlow, the most popular deep learning library, uses CUDA to run on GPUs, although OpenCL support is in the works. That said, one of the main approaches to OpenCL support, SYCL, isn't planning to support OSX:


  We have no plans to support OSX in near future. I know sad face.


The current advice is to avoid AMD GPUs:


  Currently, if you want to do DL and want to avoid major headaches, choose Nvidia.